Fuel/air ratio control for internal combustion engine

Details Fuel/air ratio control for internal combustion engine Fuel/air ratio control for internal combustion engine

1998-07-02

2000-05-09

Argenbright, Tony M.

Internal-combustion engines

Combustion chamber means having fuel injection only

Combustible mixture stratification means

123305, 12340647, 12340648, 12356821, F02B 1700, F02D 4300

Patent

active

06058906&

ABSTRACT:
An engine system for an internal combustion engine of a type having a stratified combustion mode and a homogeneous combustion mode comprises a controller for increasing a fuel air ratio (or equivalence ratio) of an air fuel mixture produced in the engine abruptly in a transient state during transition from the stratified mode to the homogenous mode to ensure stable combustion. The controller estimates a residual EGR gas quantity, and produces a step change in the fuel air ratio when the fuel air ratio enters a predetermined unstable range and the EGR gas still remains in a considerable amount.

REFERENCES:
patent: 5722363 (1998-03-01), Iida et al.
patent: 5738074 (1998-04-01), Nakamura et al.
patent: 5875756 (1999-03-01), Kamura et al.

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